US10055021B2 - Electronic device - Google Patents

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Publication number
US10055021B2
US10055021B2 US15/250,031 US201615250031A US10055021B2 US 10055021 B2 US10055021 B2 US 10055021B2 US 201615250031 A US201615250031 A US 201615250031A US 10055021 B2 US10055021 B2 US 10055021B2
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Prior art keywords
panel
suppression
signal
vibration
user
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US15/250,031
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US20160364001A1 (en
Inventor
Yoshifumi Hirose
Shoichi Araki
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Panasonic Automotive Systems Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. reassignment PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ARAKI, SHOICHI, HIROSE, YOSHIFUMI
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Assigned to PANASONIC AUTOMOTIVE SYSTEMS CO., LTD. reassignment PANASONIC AUTOMOTIVE SYSTEMS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03547—Touch pads, in which fingers can move on a surface
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
    • G06F3/0436—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which generating transducers and detecting transducers are attached to a single acoustic waves transmission substrate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/03—Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones

Definitions

  • the present disclosure relates to an electronic device that presents tactile feeling to an operation of a user.
  • Public terminals including a touch panel for example, automatic teller machine (ATM), automatic ticket vending machine, or the like
  • a touch panel for example, automatic teller machine (ATM), automatic ticket vending machine, or the like
  • personal devices including a touch panel for example, a tablet PC, a smart phone, or the like
  • a touch panel for example, a tablet PC, a smart phone, or the like
  • the touch panel is an input device that detects a touch on a panel as an input.
  • the touch panel includes a liquid crystal display or an organic electro luminescence (EL) display, etc.
  • the touch panel is also called a touch display or a touch screen.
  • the touch panel detects a touch of a user on a graphical user interface (GUI) object (for example, a button) displayed on a display region.
  • GUI graphical user interface
  • a user interface using such a touch panel has an advantage that flexibility in arrangement of the GUI object is high.
  • feedback of feeling when a button is pressed is small as compared with a user interface using a conventional mechanical button. Accordingly, there is a problem that, when a user touches a touch panel, it is difficult to recognize whether the touch is detected correctly.
  • a method for vibrating a touch panel to present tactile feeling to the touch is proposed (for example, Japanese Translation of PCT Publication 2011-501296 (PTL 1)).
  • PTL 1 proposes to change a drive voltage for vibrating the touch panel depending on the touch position and to make vibration amplitude uniform.
  • the present disclosure provides an electronic device with reduced uncomfortable tactile feeling.
  • An electronic device includes a panel which a user touches, a detector configured to detect the touch of the user on the panel, a vibrator configured to vibrate the panel, and a signal generator.
  • the signal generator generates a signal for driving the vibrator, the signal including a drive signal that generates vibration of the panel and a suppression signal that suppresses inertial vibration of the panel.
  • the suppression signal has a degree of suppression the inertial vibration that changes depending on a touch position detected by the detector.
  • a vibration control apparatus includes: a drive signal generator configured to generate a drive signal that drives a vibrator for generating vibration of a panel which a user touches; and a suppression signal generator configured to generate a suppression signal for suppression inertial vibration of the panel.
  • the vibration control apparatus outputs the drive signal and the suppression signal to the vibrator.
  • the suppression signal has a degree of suppression the inertial vibration that changes depending on a touch position of the user on the panel.
  • a method is a method for vibrating a panel of an electronic device.
  • the method includes detecting a touch of a user on the panel, generating a signal for vibrating the panel, and vibrating the panel.
  • the generated signal includes a suppression signal for suppression inertial vibration of the panel.
  • the suppression signal has a degree of suppression the inertial vibration that changes depending on a touch position of the user on the panel.
  • a recording medium is a non-transitory computer-readable recording medium storing a computer program for causing an electronic device to execute a vibration operation.
  • the computer program is a computer program for causing a computer of the electronic device to execute detecting a touch of a user on a panel of the electronic device, generating a signal for vibrating the panel, and vibrating the panel.
  • the generated signal includes a suppression signal for suppression inertial vibration of the panel.
  • the suppression signal has a degree of suppression the inertial vibration that changes depending on a touch position of the user on the panel.
  • FIG. 1 is a two-view diagram illustrating a top view and a sectional view along a vibrator of an electronic device according to an exemplary embodiment
  • FIG. 2 is a block diagram illustrating the electronic device according to the exemplary embodiment
  • FIG. 3 is a block diagram illustrating a vibration controller according to the exemplary embodiment
  • FIG. 4 is a flow chart illustrating an operation of the electronic device according to the exemplary embodiment
  • FIG. 5 is a diagram illustrating one example of a synthesized signal to be supplied from the vibration controller to the vibrator according to the exemplary embodiment
  • FIG. 6A is a diagram illustrating how vibration of a touch panel changes according to the exemplary embodiment
  • FIG. 6B is a diagram illustrating how the vibration of the touch panel changes according to the exemplary embodiment
  • FIG. 6C is a diagram illustrating how the vibration of the touch panel changes according to the exemplary embodiment
  • FIG. 6D is a diagram illustrating how the vibration of the touch panel changes according to the exemplary embodiment
  • FIG. 7A is a diagram illustrating how the vibration of the touch panel changes according to the exemplary embodiment
  • FIG. 7B is a diagram illustrating how the vibration of the touch panel changes according to the exemplary embodiment
  • FIG. 7C is a diagram illustrating how the vibration of the touch panel changes according to the exemplary embodiment
  • FIG. 7D is a diagram illustrating how the vibration of the touch panel changes according to the exemplary embodiment
  • FIG. 7E is a diagram illustrating how the vibration of the touch panel changes according to the exemplary embodiment
  • FIG. 7F is a diagram illustrating how the vibration of the touch panel changes according to the exemplary embodiment
  • FIG. 7G is a diagram illustrating how the vibration of the touch panel changes according to the exemplary embodiment
  • FIG. 8 is a diagram illustrating a relationship between a number of waves of a suppression signal and a decay time of the vibration of the touch panel when a number of waves of a drive signal is 3.0 waves according to the exemplary embodiment
  • FIG. 9 is a flowchart illustrating the operation of the electronic device according to the exemplary embodiment.
  • FIG. 10A is a diagram illustrating a manner in which a user touches a position near an antinode of the vibration of the touch panel according to the exemplary embodiment
  • FIG. 10B is a diagram illustrating a change in the vibration of the touch panel when the user touches the position near the antinode of the vibration of the touch panel according to the exemplary embodiment
  • FIG. 11A is a diagram illustrating a manner in which the user touches a position near a node of the vibration of the touch panel according to the exemplary embodiment
  • FIG. 11B is a diagram illustrating a change in the vibration of the touch panel when the user touches the position near the node of the vibration of the touch panel according to the exemplary embodiment
  • FIG. 12A is a diagram illustrating one example of the suppression signal according to the exemplary embodiment
  • FIG. 12B is a diagram illustrating one example of the suppression signal according to the exemplary embodiment.
  • FIG. 12C is a diagram illustrating one example of the suppression signal according to the exemplary embodiment.
  • FIG. 12D is a diagram illustrating one example of the suppression signal according to the exemplary embodiment.
  • FIG. 13 is a diagram illustrating the electronic device installed in an automobile according to the exemplary embodiment.
  • a drive signal is supplied to a vibrator provided in the panel, such as a piezoelectric element, and the vibrator is vibrated, thereby vibrating the panel.
  • the vibrator stops the vibration by a stop of the supply of the drive signal.
  • the panel continues the vibration for a while because of inertia.
  • This vibration caused by inertia is herein called “inertial vibration.”
  • the inertial vibration is gradually attenuated by factors such as internal loss of panel materials and air resistance, and eventually amplitude becomes zero.
  • inertial vibration can be felt by a finger of a user who touches the panel, the user will have uncomfortable tactile feeling.
  • this inertial vibration will affect a next panel operation quickly performed by the user, causing uncomfortable tactile feeling.
  • suppression of inertial vibration of the panel reduces uncomfortable tactile feeling.
  • FIG. 1 is a two-way diagram illustrating a top view and a sectional view along vibrator 13 of electronic device 10 according to the exemplary embodiment.
  • FIG. 2 is a block diagram illustrating components of electronic device 10 according to the exemplary embodiment.
  • electronic device 10 includes touch panel 11 , vibrator 13 , display panel 15 , spacer 17 , and enclosure 18 .
  • Touch panel 11 is disposed to cover display region 16 of display panel 15 .
  • a touch position is detected by detection of change in capacitance by a touch operation of a user.
  • touch panel 11 is configured to cover an entire surface of display region 16 of an image of display panel 15 .
  • touch panel 11 may be configured to cover at least part of display region 16 .
  • Spacer 17 is, for example, a buffer member, such as silicon rubber, urethane rubber, and the like. Spacer 17 is fixed to touch panel 11 and enclosure 18 by using an adhesive, a double-sided tape, and the like.
  • Vibrator 13 is attached to a back of touch panel 11 .
  • Vibrator 13 is, for example, a piezoelectric element, and expands and contracts by application of a voltage, thereby, to generate flexural vibration.
  • Vibrator 13 vibrates touch panel 11 in accordance with the drive signal.
  • the vibration provided to touch panel 11 by vibrator 13 propagates to the touch position of the user on touch panel 11 , whereby tactile feeling is presented to the user.
  • a number of vibrator 13 is two, but the number of vibrator 13 may be one, and may be three or more.
  • vibrator 13 is provided on the back of touch panel 11 , but vibrator 13 may be affixed to one of members that constitute electronic device 10 , such as display panel 15 , enclosure 18 , and the like.
  • a thin-film transparent piezoelectric member may be formed on touch panel 11 by methods such as sputtering, to be used as vibrator 13 .
  • vibrator 13 may be affixed to the cover member in a case where a cover member, etc. is on touch panel 11 , vibrator 13 may be affixed to the cover member.
  • both touch panel 11 and the cover member are called a panel member that detects the touch position.
  • vibrator 13 is not limited to the piezoelectric element, and for example, may be a vibrating motor.
  • electronic device 10 further includes display controller 25 that controls display of display panel 15 , touch-panel controller 21 that performs control of touch position detection of touch panel 11 , and vibration controller 23 that controls vibration of vibrator 13 .
  • electronic device 10 further includes microcomputer 20 , storage 26 , external communicator 27 that performs communication with outside, and various-input-output unit 29 that performs various input and output.
  • Microcomputer 20 controls operations of overall electronic device 10 .
  • Microcomputer 20 performs control of operations such as detection, determination, and the like of various pieces of information, and operations of respective components.
  • Storage 26 is, for example, a hard disk or a semiconductor memory. Storage 26 stores various programs and various pieces of data.
  • External communicator 27 uses, for example, wireless local area network (LAN), such as Wi-Fi (registered trademark) or the like, and is connected in a state where interconnectivity between a plurality of electronic devices is verified.
  • the connection between electronic devices may be methods such as a method for connection via external communication apparatuses, such as an access point or the like, or P2P (wireless ad hoc network) connection that is a method for direct connection without using external telecommunications apparatuses.
  • display panel 15 On display panel 15 , an object for receiving input from the user is displayed, such as a character, a number, an icon, a keyboard, and the like. For example, when a keyboard is displayed on display panel 15 , the user can perform character input, etc. by performing a touch operation at an arbitrary position of the keyboard.
  • display panel 15 for example, known display panels can be used, such as a liquid crystal method, an organic EL method, an electronic paper method, a plasma method, and the like.
  • Display controller 25 controls contents to be displayed on display panel 15 based on a control signal generated by microcomputer 20 .
  • display panel 15 does not necessarily need to be installed in electronic device 10 , and electronic device 10 may have a configuration that includes neither display panel 15 nor display controller 25 .
  • Touch panel 11 outputs a signal corresponding to the touch position of the user to touch-panel controller 21 .
  • Touch-panel controller 21 detects touch position (such as coordinates and the like) of the user. Touch-panel controller 21 functions as a detector that detects the touch position of the user. Touch-panel controller 21 outputs information on the touch position of the user to microcomputer 20 , vibration controller 23 , and the like.
  • touch panel 11 for example, a touch panel of an electrostatic method, a resistor film method, an optical method, an ultrasonic method, an electromagnetic method, and the like can be used.
  • touch panel 11 and display panel 15 are separate components in this example, touch panel 11 and display panel 15 may be integrally formed.
  • Touch panel 11 and display panel 15 may employ, for example, methods such as an in-cell type touch panel that integrates a touch-panel function inside a liquid crystal panel, an on-cell type touch panel that integrates the touch-panel function on a surface of the liquid crystal panel, and the like.
  • touch-panel controller 21 may acquire information that indicates a contact area and pressing force at each touch position, etc. as touch information.
  • the pressing force can be easily acquired, for example, when a touch panel of a pressure-sensitive method is used.
  • the pressing force may be acquired by using a sensor such as a load cell and the like.
  • FIG. 3 is a block diagram illustrating vibration controller 23 according to the exemplary embodiment.
  • FIG. 4 is a flow chart illustrating an operation of electronic device 10 according to the exemplary embodiment.
  • FIG. 5 is a diagram illustrating synthesized signal 43 to be supplied from vibration controller 23 to vibrator 13 according to the exemplary embodiment.
  • Vibration controller 23 functions as a signal generator that generates a signal for driving vibrator 13 .
  • Vibration controller 23 includes drive signal generator 31 , suppression signal generator 32 , and signal synthesizer 33 .
  • touch-panel controller 21 When detecting a touch of the user on touch panel 11 , touch-panel controller 21 outputs information regarding the touch, such as the touch position, to vibration controller 23 (step S 10 ).
  • drive signal generator 31 Based on the information regarding the touch, drive signal generator 31 generates drive signal 41 that drives vibrator 13 in order to generate vibration of touch panel 11 (step S 11 ).
  • suppression signal generator 32 generates suppression signal 42 for suppression the inertial vibration of touch panel 11 (step S 12 ).
  • Signal synthesizer 33 generates synthesized signal 43 obtained by synthesis of drive signal 41 and suppression signal 42 , and then outputs synthesized signal 43 to vibrator 13 (step S 13 ).
  • Vibrator 13 is driven by the synthesized signal and vibrates, and the vibration propagates to touch panel 11 , thereby presenting tactile feeling to the user (step S 14 ).
  • FIG. 5 is a diagram illustrating one example of synthesized signal 43 supplied from vibration controller 23 to vibrator 13 according to the exemplary embodiment.
  • a vertical axis represents amplitude
  • a horizontal axis represents time.
  • Synthesized signal 43 includes drive signal 41 and suppression signal 42 .
  • Drive signal 41 is first supplied to vibrator 13 , and then vibrator 13 vibrates touch panel 11 . Then, following drive signal 41 , suppression signal 42 for suppression the inertial vibration of touch panel 11 is supplied to vibrator 13 .
  • Suppression signal 42 differs from drive signal 41 in phase.
  • drive signal 41 is 180 degrees phase-shifted from suppression signal 42 .
  • Such suppression signal 42 drives vibrator 13 in a direction of canceling the inertial vibration of touch panel 11 , weakening the inertial vibration of touch panel 11 . This allows reduction in uncomfortable tactile feeling resulting from the inertial vibration.
  • a form of 180-degree phase shift is one example, and as long as the inertial vibration can be weakened, an amount of phase shift may be other than 180 degrees.
  • FIG. 6A to FIG. 6D are diagrams illustrating how vibration of touch panel 11 changes according to the exemplary embodiment.
  • FIG. 6A and FIG. 6B illustrate a change in the vibration of touch panel 11 when vibrator 13 is driven by a signal including only drive signal 41 without including suppression signal 42 .
  • FIG. 6C and FIG. 6D illustrate a change in the vibration of touch panel 11 when vibrator 13 is driven by synthesized signal 43 including both drive signal 41 and suppression signal 42 .
  • a vertical axis represents intensity of the vibration (amplitude) of touch panel 11
  • a horizontal axis represents time.
  • vibration 51 is generated in touch panel 11 .
  • a dotted area illustrated in FIG. 6A indicates inertial vibration component 52 of touch panel 11 that continues even after the supply of drive signal 41 is stopped.
  • the lower perceptual limit is a lower limit of vibration amplitude the user can perceive. Since suppression signal 42 is not supplied to vibrator 13 in the example illustrated in FIG.
  • a time period during which the amplitude of the inertial vibration is larger than the lower perceptual limit is longer and a perception time of the user is longer than in the example illustrated in FIG. 6C in which suppression signal 42 is supplied to vibrator 13 .
  • FIG. 6B illustrates vibration 51 of touch panel 11 when drive signal 41 is smaller than drive signal 41 in the example illustrated in FIG. 6A . Since maximum amplitude of touch panel 11 is smaller in the example illustrated in FIG. 6B than in the example illustrated in FIG. 6A , the inertial vibration is attenuated more quickly, and the perception time is shorter than in the example illustrated in FIG. 6A . Since the perception time of the user differs significantly between the example illustrated in FIG. 6A and the example illustrated in FIG. 6B , the user will feel uncomfortable tactile feeling.
  • vibration 53 is generated in touch panel 11 .
  • a dotted line illustrates vibration 51 for comparison. Since suppression signal 42 is supplied to vibrator 13 in the example illustrated in FIG. 6C , the inertial vibration is suppressed more and the amplitude of the inertial vibration that is larger than the lower perceptual limit is in a shorter time than in the example illustrated in FIG. 6A , which can shorten the perception time of the user. This allows the user to have less uncomfortable feeling because the inertial vibration is less likely to affect the next panel operation of the user when the user performs the next panel operation quickly.
  • FIG. 6D illustrates vibration 53 of touch panel 11 when drive signal 41 and suppression signal 42 are smaller than in the example illustrated in FIG. 6C .
  • suppression signal 42 suppresses the inertial vibration. Accordingly, in the example illustrated in FIG. 6D , this can make the perception time of the user almost identical to the perception time in the example illustrated in FIG. 6C , and this allows the user to have less uncomfortable feeling in a similar manner to the example illustrated in FIG. 6C .
  • FIG. 7A to FIG. 7G are diagrams illustrating how the vibration of touch panel 11 changes according to the exemplary embodiment, and how the vibration of touch panel 11 changes when the number of waves of suppression signal 42 is changed.
  • a vertical axis represents amplitude
  • a horizontal axis represents time.
  • the number of waves of drive signal 41 is 3.0 waves (three cycles).
  • FIG. 7A illustrates the vibration of touch panel 11 when the number of waves of suppression signal 42 is zero waves.
  • FIG. 7B illustrates the vibration of touch panel 11 when the number of waves of suppression signal 42 is 0.5 waves.
  • FIG. 7C illustrates the vibration of touch panel 11 when the number of waves of suppression signal 42 is 1.0 wave.
  • FIG. 7D illustrates the vibration of touch panel 11 when the number of waves of suppression signal 42 is 1.5 waves.
  • FIG. 7E illustrates the vibration of touch panel 11 when the number of waves of suppression signal 42 is 2.0 waves.
  • FIG. 7F illustrates the vibration of touch panel 11 when the number of waves of suppression signal 42 is 2.5 waves.
  • FIG. 7G illustrates the vibration of touch panel 11 when the number of waves of suppression signal 42 is 3.0 waves.
  • FIG. 8 is a diagram illustrating a relationship between the number of waves of suppression signal 42 and a decay time of the vibration of touch panel 11 when the number of waves of drive signal 41 is 3.0 waves according to the exemplary embodiment.
  • the number of waves of drive signal 41 is 3.0 waves
  • the number of waves of suppression signal 42 is 2.0 waves or more
  • the inertial vibration of touch panel 11 is attenuated effectively.
  • too large a number of waves of suppression signal 42 now causes new vibration to be generated by suppression signal 42 , as indicated by a comparison between FIG. 7E and FIG. 7G .
  • the number of waves of suppression signal 42 is set to be smaller than the number of waves of drive signal 41 so as to prevent generation of such new vibration.
  • FIG. 9 is a flowchart illustrating the operation of electronic device 10 according to the exemplary embodiment, and is a flowchart illustrating the operation of generating suppression signal 42 so that the degree of suppression the inertial vibration may differ depending on the touch position of the user on touch panel 11 .
  • FIG. 10A is a diagram illustrating a manner in which a user touches a position near antinode 61 of the vibration of touch panel 11 according to the exemplary embodiment
  • FIG. 10B is a diagram illustrating a change in vibration 51 of touch panel 11 when the user touches the position near antinode 61 of the vibration of touch panel 11 according to the exemplary embodiment.
  • FIG. 11A is a diagram illustrating a manner in which the user touches a position near node 62 of the vibration of touch panel 11 according to the exemplary embodiment
  • FIG. 11B is a diagram illustrating a change in vibration 53 of touch panel 11 when the user touches the position near node 62 of the vibration of touch panel 11 according to the exemplary embodiment.
  • the amplitude When touch panel 11 vibrates in a zeroth resonant mode, the amplitude may be large near a center of touch panel 11 , and the amplitude may be small near an end of touch panel 11 .
  • a section with large amplitude of the vibration is called an antinode of the vibration, whereas a section with small amplitude of the vibration is called a node of the vibration.
  • a section near the center of touch panel 11 is antinode 61 of the vibration with large amplitude.
  • vibration 51 is suppressed by pressing force caused by the touch as illustrated in FIG. 10B , and thus the inertial vibration is also attenuated more quickly than in the examples illustrated in FIG. 11A and FIG. 11B .
  • the inertial vibration can be sufficiently suppressed.
  • suppression signal 42 may be unnecessary.
  • touch-panel controller 21 when it is detected that the user touches touch panel 11 , touch-panel controller 21 outputs information regarding the touch including the touch position to vibration controller 23 (step S 20 ).
  • drive signal generator 31 Based on the touch position detected in step S 20 , drive signal generator 31 generates drive signal 41 (step S 21 ).
  • suppression signal generator 32 determines a signal length (the number of waves) of suppression signal 42 (step S 22 ).
  • suppression signal generator 32 increases the number of waves of suppression signal 42 .
  • suppression signal generator 32 decreases the number of waves of suppression signal 42 .
  • FIG. 12A and FIG. 12B are diagrams illustrating one example of suppression signal 42 according to the exemplary embodiment.
  • FIG. 12A illustrates one example of suppression signal 42 when the user touches the position near the end (near node 62 ) of touch panel 11
  • FIG. 12B illustrates one example of suppression signal 42 when the user touches the position near the center (near antinode 61 ) of touch panel 11 .
  • the number of waves of suppression signal 42 is 2.0 waves in FIG. 12A
  • the number of waves of suppression signal 42 is 1.0 wave in FIG. 12B .
  • suppression signal generator 32 generates suppression signal 42 according to the number of waves determined in step S 22 (step S 23 ).
  • Signal synthesizer 33 generates synthesized signal 43 obtained by synthesis of drive signal 41 and suppression signal 42 , and then outputs synthesized signal 43 to vibrator 13 (step S 24 ).
  • Vibrator 13 is driven by synthesized signal 43 generated in step S 24 and vibrates, and the vibration propagates to touch panel 11 , thereby presenting tactile feeling to the user (step S 25 ).
  • suppression signal 42 so that the degree of suppression the inertial vibration may differ depending on the touch position of the user on touch panel 11 , the inertial vibration can be appropriately suppressed.
  • amplitude of suppression signal 42 may be changed depending on the touch position.
  • FIG. 12C One example of this operation will be illustrated with reference to FIG. 12C .
  • FIG. 12C is a diagram illustrating one example of suppression signal 42 according to the exemplary embodiment, illustrating one example of suppression signal 42 when the user touches the position near the center (near antinode 61 ) of touch panel 11 .
  • the amplitude of suppression signal 42 illustrated in FIG. 12C is small.
  • a ratio of the amplitude of drive signal 41 to the amplitude of suppression signal 42 may be changed depending on the touch position.
  • the ratio of the amplitude of drive signal 41 to the amplitude of suppression signal 42 is approximately 1:1, and the degree of suppression the inertial vibration is large.
  • the ratio of the amplitude of drive signal 41 to the amplitude of suppression signal 42 is approximately 2:1, and the degree of suppression the inertial vibration is small.
  • phase of drive signal 41 and the phase of suppression signal 42 may be changed depending on the touch position.
  • This operation will be illustrated with reference to FIG. 12D .
  • FIG. 12D is a diagram illustrating one example of suppression signal 42 according to the exemplary embodiment.
  • the phase of drive signal 41 may differ from the phase of suppression signal 42 by 90 degrees as illustrated in FIG. 12D .
  • the phase difference between drive signal 41 and suppression signal 42 may be closer to 180 degrees than in a case where the touch position is close to antinode 61 .
  • suppression signal 42 may be generated by a combination of the change in the number of waves, change in amplitude, and change in phase.
  • suppression signal 42 may be generated so that the degree of suppression the inertial vibration may differ depending on magnitude of force by which the user presses touch panel 11 .
  • the effect of suppression the inertial vibration by the force of touch is smaller than in a case where the force of pressing touch panel 11 is relatively large. Accordingly, the inertial vibration can be appropriately suppressed by generation of suppression signal 42 with the relatively large degree of suppression the inertial vibration in a case where the force of pressing touch panel 11 is relatively small as compared with the case where the force of pressing touch panel 11 is relatively large.
  • suppression signal 42 may be generated so that the degree of suppression the inertial vibration may differ depending on a size of a contact area when the user touches touch panel 11 .
  • the contact area can be determined, for example, by detection of an area in which capacitance between an X electrode and a Y electrode of touch panel 11 changes.
  • the effect of suppression the inertial vibration by the touch is smaller than in a case where the contact area of the touch is relatively large. Accordingly, in the case where the contact area of the touch is relatively small, the inertial vibration can be appropriately suppressed by generation of suppression signal 42 with the degree of suppression the inertial vibration larger than in the case where the contact area of the touch is relatively large.
  • electronic device 10 may be a touch input apparatus installed in an automobile.
  • FIG. 13 is a diagram illustrating electronic device 10 installed in an automobile according to the exemplary embodiment. In an example illustrated in FIG. 13 , electronic device 10 is installed in a so-called center console portion between a driver's seat and a passenger seat.
  • the user can use electronic device 10 to operate onboard equipment, such as car navigation apparatus 70 , a car audio, an air conditioner, and the like.
  • onboard equipment such as car navigation apparatus 70 , a car audio, an air conditioner, and the like.
  • Car navigation apparatus 70 is installed in the automobile.
  • Electronic device 10 is communicatively connected to car navigation apparatus 70 .
  • Electronic device 10 receives a touch operation by a finger of the user.
  • the user can use electronic device 10 to operate car navigation apparatus 70 and to cause car navigation apparatus 70 to perform navigation to a destination.
  • electronic device 10 is capable of providing the user with appropriate feeling of operation, by suppression the inertial vibration as described above.
  • electronic device 10 and car navigation apparatus 70 are separate bodies, but electronic device 10 and car navigation apparatus 70 may be integrated to form one car navigation apparatus.
  • the above-described exemplary embodiment has been described by way of example of a technique to be disclosed in the present application.
  • the technique in the present disclosure is not limited to these, and changes, replacements, additions, omissions, etc. may be made to the exemplary embodiment as needed.
  • the electronic device may be an electronic device that includes a touch panel, for example, a cellular phone, a personal digital assistant (PDA), a game machine, a car navigation system, ATM, etc.
  • a touch panel for example, a cellular phone, a personal digital assistant (PDA), a game machine, a car navigation system, ATM, etc.
  • the electronic device includes a display panel, but the electronic device does not need to include the display panel.
  • the electronic device may be, for example, an electronic device such as a touch pad.
  • the operation unit may be, for example, a pointing device like a mouse.
  • vibrator 13 is provided in the mouse and vibrates the mouse.
  • the vibrator may be affixed to an enclosure, a frame, etc.
  • the vibrator is a piezoelectric element, but the vibration may be propagated by another method, such as an actuator by electrostatic force, a voice coil motor (VCM), a vibrating motor, and the like.
  • a thin-film transparent piezoelectric member may be formed on the panel by a method such as sputtering and the like, to be used as the vibrator.
  • flexural vibration is illustrated as a type of vibration, but the vibration may be vibration caused by a wave of condensation and rarefaction, and a surface wave.
  • touch panel and the display panel as separate bodies, but the touch panel and the display panel may be connected to each other by optical bonding, etc.
  • the touch panel and the display panel are separate components, but the touch panel and the display panel may be integrally formed.
  • the touch panel and the display panel may be integrally formed by methods such as an in-cell type touch panel that integrates a touch-panel function inside a liquid crystal panel, and an on-cell type touch panel that integrates the touch-panel function on a surface of the liquid crystal panel.
  • the vibrator may be provided on a back of the display panel.
  • tactile feeling is presented to the user by occurrence of vibration, but the technique of the present disclosure is not limited to this example.
  • tactile feeling may be presented to the user by other methods, for example, change in friction caused by static electricity, a stimulus on a skin caused by an electric current, change in a screen shape caused by a liquid, and the like. Not only presentation of tactile feeling but also screen display, sound, light, heat, etc. may be combined as needed.
  • microcomputer may fulfill operations of at least one of the display controller, the touch-panel controller, and the vibration controller.
  • the above-described operations of the electronic device may be implemented by hardware, and may be implemented by software.
  • a program that executes such operations may be stored in the storage, and may be stored in a built-in memory or read-only memory (ROM) of the microcomputer.
  • ROM read-only memory
  • such a computer program may be installed in the electronic device from a recording medium (such as an optical disc, a semiconductor memory, and the like) in which the computer program is recorded, and may be downloaded over electric telecommunication lines, such as the Internet and the like.
  • electronic device 10 includes a panel which a user touches, a detector configured to detect the touch of the user on the panel, vibrator 13 configured to vibrate the panel, and a signal generator.
  • the signal generator generates a signal for driving vibrator 13 , the signal including a drive signal that generates vibration of the panel and a suppression signal that suppresses inertial vibration of the panel.
  • the suppression signal has a degree of suppression the inertial vibration that changes depending on a touch position detected by the detector.
  • touch-panel controller 21 is one example of the detector
  • vibration controller 23 is one example of the signal generator
  • touch panel 11 is one example of the panel.
  • Electronic device 10 can reduce uncomfortable tactile feeling by suppression the inertial vibration of touch panel 11 .
  • vibration controller 23 which functions as the signal generator, may generate a signal for generating vibration of touch panel 11 so that the signal and the suppression signal may differ from each other in phase.
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal so that the degree of suppression the inertial vibration may differ depending on the touch position of the user on touch panel 11 .
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with amplitude that differs depending on the touch position of the user on touch panel 11 .
  • vibration controller 23 which functions as the signal generator, may generate a signal for generating vibration of touch panel 11 so that a ratio of amplitude of the signal to amplitude of the suppression signal may differ depending on the touch position of the user on touch panel 11 .
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with a number of waves that differs depending on the touch position of the user on touch panel 11 .
  • vibration controller 23 which functions as the signal generator, may generate a signal for generating vibration of touch panel 11 so that a difference between a phase of the signal and a phase of the suppression signal may differ depending on the touch position of the user on touch panel 11 .
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with the larger degree of suppression the inertial vibration than in a case where the touch position of the user on touch panel 11 is closer to the antinode than to the node.
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with the larger amplitude than in the case where the touch position is closer to the antinode than to the node.
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with a larger amplitude ratio to a signal for generating vibration of touch panel 11 than in the case where the touch position is closer to the antinode than to the node.
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with a larger number of waves than in the case where the touch position is closer to the antinode than to the node.
  • vibration controller 23 which functions as the signal generator, may generate a signal for generating vibration of touch panel 11 so that a phase difference between the signal and the suppression signal may be closer to 180 degrees than in the case where the touch position is closer to the antinode than to the node.
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with the larger degree of suppression the inertial vibration than in a case where the touch position is closer to the center than to the end.
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with the larger amplitude than in the case where the touch position is closer to the center than to the end.
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with a larger amplitude ratio to a signal for generating vibration of touch panel 11 than in the case where the touch position is closer to the center than to the end.
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with a larger number of waves than in the case where the touch position is closer to the center than to the end.
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal so that the degree of suppression the inertial vibration may differ depending on magnitude of force by which the user presses touch panel 11 .
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with the larger degree of suppression the inertial vibration than in a case where the force of pressing touch panel 11 is large.
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal so that the degree of suppression the inertial vibration may differ depending on a size of a contact area of touch panel 11 which the user touches.
  • vibration controller 23 which functions as the signal generator, may generate the suppression signal with the larger degree of suppression the inertial vibration than in a case where the contact area is large.
  • a vibration control apparatus includes: drive signal generator 31 configured to generate a drive signal that drives vibrator 13 for generating vibration of a panel which a user touches (touch panel 11 ); and suppression signal generator 32 configured to generate a suppression signal for suppression the inertial vibration of the panel.
  • the vibration control apparatus outputs the drive signal and the suppression signal to vibrator 13 .
  • the suppression signal has a degree of suppression the inertial vibration that changes depending on a touch position of the user on the panel. Note that in the present exemplary embodiment, the vibration control apparatus is substantially identical to vibration controller 23 .
  • a method is a method for vibrating a panel of electronic device 10 (touch panel 11 ).
  • the method includes detecting a touch of a user on the panel, generating a signal for vibrating the panel, and vibrating the panel.
  • the generated signal includes a suppression signal for suppression inertial vibration of the panel.
  • the suppression signal has a degree of suppression the inertial vibration that changes depending on a touch position of the user on the panel.
  • a recording medium is a non-transitory computer-readable recording medium storing a computer program for causing electronic device 10 to execute a vibration operation.
  • the computer program is a computer program for causing a computer of electronic device 10 to execute the steps of detecting a touch of a user on a panel of electronic device 10 (touch panel 11 ), generating a signal for vibrating the panel, and vibrating the panel.
  • the generated signal includes a suppression signal for suppression inertial vibration of the panel.
  • the suppression signal has a degree of suppression the inertial vibration that changes depending on a touch position of the user on the panel.
  • the technique according to the present disclosure is particularly useful in a technical field in which tactile feeling is presented to the user's operation, and can be applied to apparatuses, for example, a mobile information terminal, a cellular phone, onboard equipment for a vehicle, a television, a digital still camera, a digital video camera, a personal computer, an electronic white board, a display for digital signage, and the like.

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  • User Interface Of Digital Computer (AREA)
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JP2017182496A (ja) 2016-03-30 2017-10-05 ソニー株式会社 制御装置、制御方法およびプログラム
JP2019091198A (ja) * 2017-11-14 2019-06-13 シャープ株式会社 入力装置
US10503261B2 (en) * 2017-12-15 2019-12-10 Google Llc Multi-point feedback control for touchpads
JP7318306B2 (ja) 2019-05-28 2023-08-01 コニカミノルタ株式会社 操作振動装置、画像形成装置及びプログラム
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